How to burn a CD/DVD multiple times?

Hi,
Consider I have a raw (unused) CD/DVD. I want to burn some data in it. My data only gets about 20% of the capacity of that CD or DVD. Maybe some time in future I want to add some more data on that. How can I burn that primary data to that CD to be able to add more in future?
Is it possible to do that work with only Windows built-in apps or I should surely use some other apps like Nero?
My machine: Windows 7 Ultimate 32-bit

Yes, it is possible with the built in stuff in Windows. When you insert a blank disc it asks if you want to use it like a USB drive or like ... something else, I forget right now and I'm not on a Windows machine. Choose USB.

If you don't get that message, then you'll need to reset the actions or whatever happens when you insert a blank cd/dvd.

Sorry I don't have the specific details, hopefully someone else will chime in with those. But, if you haven't told windows to not prompt you when you insert a blank disc then it will give you that option (to choose use like a USB) and that is what you want to pick.